does freemarker support show all variable in data-model?

Question

I want to see all variables in freemarker data-model, just like struts2 debug tag to show value stack.

Is there a way for freemarker to do this ?

Answer 1

An even more detailed way would be this macro:

<#macro dump_object object debug=false>
    <#compress>
        <#if object??>
            <#attempt>
                <#if object?is_node>
                    <#if object?node_type == "text">${object?html}
                    <#else><${object?node_name}<#if object?node_type=="element" && object.@@?has_content><#list object.@@ as attr>
                        ${attr?node_name}="${attr?html}">
                        <#if object?children?has_content><#list object?children as item>
                            <@dump_object object=item/><#else>${object} </${object?node_name}>
                <#elseif object?is_method>
                    #method
                <#elseif object?is_sequence>
                        [<#list object as item><@dump_object object=item/><#if !item?is_last>, ]
                <#elseif object?is_hash_ex>
                        {<#list object as key, item>${key?html}=<@dump_object object=item/><#if !item?is_last>, }
                <#else>
                    "${object?string?html}"
                
            <#recover>
                <#if !debug>
            
        <#else>
            null
        
    


<@dump_object object=.data_model/>

This gives you a full dump of your data model.